LEWATIT® UltraPure 1221 MD

Summary

Product identification

• Product name: Lewatit® UltraPure 1221 MD
• Type: Strongly acidic cation exchange resin (SAC)
• Matrix: Styrenic, macroporous structure
• Bead type: Monodispersed (uniform particle)
• Functional group: Sulfonic acid
• Delivery form: Na⁺ form
• Appearance: Beige, grey

Operating limits

• Operating temperature: max. 140 °C
• Operating pH range (during exhaustion): 2-14
• Stability pH range: 0.1-14
• Storage temperature range: -20 - +40 °C
• Storage time (after delivery): max. 2 years
• Max. pressure loss during operation: 300 kPa

Feed water

• Regeneration concentration (HCl): approx. 4-6 wt.%
• Regeneration quantity (HCl, co-current): min. 100 g/L resin
• Regeneration quantity (HCl, counter-current): min. 55 g/L resin
• Regeneration concentration (H₂SO₄): approx. 1.5-8 wt.%
• Regeneration quantity (H₂SO₄, co-current): min. 120 g/L resin
• Regeneration quantity (H₂SO₄, counter-current): min. 80 g/L resin
• Regeneration contact time: min. 20 minutes
• Slow rinse at regeneration flow rate: min. 2 BV
• Fast rinse at service flow rate: min. 2 BV
• Backwash bed expansion (at 20°C): 4.5 % per m/h
• Specific pressure loss (at 15°C): 0.8 kPa·h/m²
• Specific flow rate: max. 100 BV/h
• Bed depth for single column: min. 800 mm

Product water

• Ultrapure water rinse test (resistivity) after 80 BV: min. 4 MOhm·cm
• Ultrapure water rinse test delta TOC after 80 BV: max. 50 ppb

Electrical

• No specific electrical parameters were listed.

Mechanical / hydraulic

• Uniformity coefficient: max. 1.1
• Mean bead size (d50): 0.65 (±0.05) mm
• Total capacity (delivery form): min. 1.7 eq/L
• Bulk density for shipment (±5%): 740 g/L
• Density: approx. 1.24 g/mL
• Water retention (delivery form): approx. 52-57 wt.%
• Volume change (Na⁺ - H⁺): max. approx. 8 %

Additional Information

• Safety: Avoid contact with strong oxidants like nitric acid. Observe the safety data sheet.
• Disposal: Dispose according to European waste nomenclature.
• Storage: Store above freezing point, dry, under roof, out of direct sunlight. If frozen, thaw gradually at ambient temperature. Packaging stability is limited to 24 months.

Disclaimer: This extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror